The ape originally known as Xina was the product of an enhancement of simian intelligence. When her trainer was slain, she turned to crime and eventually joined the Institute of Evil, becoming known as Ape-X.
When the Institute was defeated by the Squadron Supreme, Ape-X was behavior-modified and elected to full membership in the Squadron. She later suffered from a psychotic withdrawal from reality, due to the behavior modification process.
Ape-X has human genius-level intelligence, and great mechanical aptitude.
Ape-X’s legs and lower torso have been amputated, necessitating the use of her mobile platform for vehicular transportation.